6х (в квадрате) + х - 7= 0 3х ( вквадрате) - 48 = 0
6X^2 + X - 7 = 0 D = 1 - 4*6*(-7) = 1 + 168 = 169 V D = 13 X1 = ( - 1 + 13 ) : 12 = 1 X2 = ( - 14 ) : 12 = ( - 7/6) = ( - 1 1/6 ) ============================= 3X^2 - 48 = 0 3X^2 = 48 X^2 = 16 X^2 = 4^2 X1 = + 4 X2 = - 4